Search results
Results from the WOW.Com Content Network
The St. Louis Limestone is a large geologic formation covering a wide area of the midwest of the United States. It is named after an exposure at St. Louis, Missouri . It consists of sedimentary limestone with scattered chert beds, including the heavily chertified Lost River Chert Bed in the Horse Cave Member .
An oral tradition in St. Louis links the cave system with the Underground Railroad. According to this tradition a tunnel behind the house at 3314 Lemp Avenue was used as a secret entrance to the caves. One entrance to the caves opens near the Mississippi River, where the slaves could make their way to freedom. [3]
Cliff Cave, also known as Indian Cave, is a natural cave that is considered the second longest cave in St. Louis County, with 4723 ft (1514 m) of cave passage surveyed. [3] [9] It is found at the head of a ravine, with a stream flowing from the entrance. [19] It is developed in Mississippian Period St. Louis limestone. [3]
The Tippecanoe comprises the St. Peter Sandstone, Joachim Dolomite, Plattin Limestone, Decorah Shale, Kimmswick Limestone, and an unconformity, followed by the Girardeau Limestone (only in the southeast), Maquoketa Shale and northeast Missouri Noix Limestone.
Meramec Caverns is the collective name for a 4.6-mile (7.4 km) cavern system in the Ozarks, near Stanton, Missouri. [1] The caverns were formed from the erosion of large limestone deposits over millions of years.
The Ste. Genevieve Limestone is a geologic formation named for Ste. Genevieve, Missouri where it is exposed and was first described. It is a thick-bedded limestone that overlies the St. Louis Limestone. Both are Mississippian in age. The St. Louis Limestone is Meramecian and the Ste. Genevieve is the base of the Chesterian series. [1]
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
The limestone layers of the stratigraphic column beneath the Big Clifty, in increasing order of depth below the ridgetops, are the Girkin Formation, the Ste. Genevieve Limestone, and the St. Louis Limestone. The large Main Cave passage seen on the Historic Tour is located at the bottom of the Girkin and the top of the Ste. Genevieve Formation.